Harness-sheave stand for looms



Dec. 30, 1930. A. E. BRICKMAN -1,786,696

HARNESS SHEAVE STAND FOR LOOMS Filed Sept. 19. 1929 /7 Ta/VWS Patented Dec. 3U, L1930 irene, STATES ALLEN E. BRICKMAN, F WORCESTER, MASSACHUSETTS, ASSIGNOR'TO CBOMPTON KNOWLES LOIVI VV'ORKS,` OF VORCESTER, .MASSACHUSETTS, .A CORPGRATION 0F MASSACHUSETTS p HARNESS-SHEf-VE STAND FOR LOOMS Application ed September 19, `1929.' Serial No. 393,823.y

This invention relates to improvements in stands for the harness sheaves of looms and it isthe general object of the invention to'provide a Vstand formed of component parts which maybe tightly but quickly clamped to the archy of the loom.

In the construction of certain types of looms there is employed a steel angle arch which is substantially T-shapedpfin section. The sheaves extend rbetween the twor arches and should be held so that they can be raised to compensate for the stretching of the harness cords. it is an important'object of my present invention to provide a built-up stand which has parts to engage four sides of the arch and be held in position by a single screw or bolt.

lVith these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein a convenient embodiment of my invention is set forth,

Fig. 1 is a front elevation of the upperportion of a loom having my invention applied thereto,

Fig. 2 is a view similar to a portion of Fig. 1 on an enlarged scale,

Fig. 3 is a vertical section on line 3-3 of Fig. 2 looking in the direction of the arrows,

Fig. 4 is a vertical section on line H of Fig. 2, and

Fig. 5 is a detail vertical section on line 5-5 of Fig. 2.

Referring to Fig. 1 the loom frame 10fis provided with front and rear arches 11 and 12, respectively. The harness frames, one of which is designated at 13, are provided with hooks 14 to receive the lower ends of harness cords 15. The latter pass yover sheaves 16 and thence to the harness controlling mechanisni not shown, such for instance, as a dobby. The sheaves are in two groups, each group on a shaft 17, and each harness frame has a pair of sheaves in each group.

Itis to be understood that during the operi ation of `the loom the cords will be raised or depressed, dependng upon the desired movement of the harness frames, the sheaves rotating about the shafts 17. The matter thus far described is of common construction except the'particular form of the arch and forms no part of my present invention. y

In carrying my invention into effect I provide the arches with a cross section such as shown in Fig. 3, each arch having a horizon,` tal upper portion or shelf 2O and a lower vertical depending web 21 integral with the upper portion 20. Inasmuch as the structure associated with each end of each shaft k17' is the same I will describe but one structure.

Eachend of the shaft 17 passes into an open bearing 22 which has as shown in Fig. 2 a lateral extension 23 resting on a head 24 of bolt 25. The upper end of the. latter is threaded. ask at 26 and carries a thumb nut 27 provided with a notch 28to receive a V- shaped'holding rib 29 on a stand member 30. The latter has a foot 31 whichrests on the top ofy the shelf of the arch and has a vertical hub 32 through which the screw 25 may pass freely. The stand member has a depending arm 33 formed with ai vertical surface 34 shown in Fig. 3 as engaging the righthand side of web 21. 33 is kprovided with an inclined surface 35 which as shown hereinextends upwardly and toward the shaft 17.

A second stand member 36 has the upper end 37 thereof in engagement with the left side of the web 21, while the lower portion thereof is provided with an inclined surface 38 similar to the surface 35 and in engagement therewith. A securing bolt 39 passesL through avertical slot in the member 36 and is threaded into the lower portion of the arm 33. The slot 40 permits the members v3() and 36 to have `a limited vertical relative move? ment with respect to each other.

ln assemb ing, the members and 36will be placed approximately as shown in Fig. Li witn the bolt 39 passing loosely through the slot Li() of the niember36. `The inclined surfaces and 38 will be in Contact with one another andthe bolt willv be tightened, causing a slight relative sliding movement lof said inclined surfaces. Assuming that at the outset the member 36 is in its final Thelower portion of the arm position, that is, with the upper end 37 in contact with the web 2l and the shoulder 41 thereof engaging the under side of the web, tightening the bolt 39 will cause coaction of the inclined surfaces and draw the arm 33 downwardly until the foot 3l engages the shelf of the arch. The parts are so propor tioned that the vertical face 34 of the arm 33 will engage the web 3l at this time, so that the p arts are clamped together tightly by the bolt. The screw is then passed up through the hub 32 and bearing 22 and the end of the shaft 17 placed in the latter. The thumb nut is then threaded over the screw and manipulated until the shaft has reached the desired vertical position.

lVhen it is desired to chang-e the position of the sheaves along the arches in a horizontal direction, the bolt 39 may be loosened and the members and 86 slipped along the arch to the new position, after which the bolt may be tightened to clamp the -parts in pesition.

From the foregoing it will be seen that I have provided a very simple means for clamping they supports for the sheave supporting shafts 17 in the desired position both vertically and longitudinally along the arches, the means comprising two parts with cooperating inclined surfaces which cause relative movement of the members when a clamping bolt is tightened, the members thereby being drawn tightly against the arch.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limk ited to the details herein disclosed, but what I 'claim is:

l. In a loom having harness sheaves on a shaft and arches having spaced vertical faces and spaced horizontal faces, a pair of mem bei's one to engage one vertical and one horizontal .surface of the arch and the other to engage the other vertical and horizontal surfaces of the arch, said members having coacting surfaces which are inclined with respect to the horizontal and vertical surfaces of the arch, means to clamp the members against the arch and to hold the inclined surfaces in contact with each other, and a device supported by one of the members to hold the sheave shaft.

2. In a loom having harness sheaves on a shaft and arches having spaced vertical faces and spaced horizontal faces, a member to engage one of the vertical and one of the horizontal surfaces of the arch, said member having a surface which is inclined with respect to the surfaces on the arch which it engages, a second member having portions to engage the other horizontal and vertical surfaces of the arch and having also an inclined surface Asubstantially parallel to the inclined surface of the first member, clamping means to cause tight engagement of the members along the inclined surfaces to move said members into close contact with the arch, and a. device carried by one of the members to support the sheave shaft.

3. n a loom having harness sheaves on a shaft and an arch having an angular cross section with a shelf` havingA an upper horizontal surface and a web with spaced vertical substantially parallel surfaces, `aid web also having a lower horizontal surface parallel to the first named surface, a stand member to engage the first horizontal surface, a second stand member to engage the second horizontal surface on the web, one member to engage one of the vertical surfaces and the other member to engage the other vertical surface, inclined coacting surfaces formed on said members, clamping means to draw the members together so that they will be in contact with their respect-ive parts of the arch and to hold the inclined portions in tight contact with each other, and means carried by one of the members to support the sheave shaft;

In testimony whereof I have hereunto affixed my signature.

ALLEN E. BRICKMAN. 

